In Reply To #4
I'm pretty certain that it doesn't work with the FC Twin(if your talking the US version). I have a Retro Duo(and a NES, btw) and it works just about perfect the sound might be slightly off(as with most Konami games on the system). I did a quick google search to see what the other console you mentioned was and, incidently, a wiki page came up stating it works with CVIII.